At the end of SalemSeason 1, Episode 5 ("Lies"), Mary (Janet Montgomery) decided to take Mercy (Elise Eberle) under her wing after it became clear she couldn't be controlled in other ways. Well, as we can see in this sneak peek of Episode 6 ("The Red Rose and the Briar") — exclusive to Wetpaint Entertainment— Tituba (Ashley Madekwe) is less than thrilled with this new arrangement.

In fact, Tituba wants to know exactly when Mary plans on offing Mercy. But don't worry, Mercy fans — it looks like killing this girl is not in Mary's plan.

Want to know more? Here's the official synopsis of the episode:

"Alden and Cotton find themselves face-to-face with a real witch, and an unlikely ally keeps the coven from tracking down their missing sister. Tituba feels left out when Mary decides to initiate a new member into the coven. As Mary takes her new acolyte under her wing, she recalls her own path after the fateful events surrounding Alden’s departure from town seven years ago. Meanwhile, Alden and Cotton learn to their horror that the trials have actually been helping the witches — and soon find themselves under attack after they lose control of their captive."

Tune into Episode 6 of Salem Sunday, May 18, at 10 p.m. ET/PT on WGN America.